Molar mass

Molar Mass of Naphthalene

The molar mass of naphthalene (C10H8) is 128.174 g/mol.

Naphthalene at a glance

PropertyValue
Molar mass128.174 g/mol
Molecular weight128.174 u
Chemical formulaC10H8
Monoisotopic mass128.0626 u
CAS number91-20-3
PubChem CID931

How to calculate the molar mass of naphthalene

10 × 12.011 + 8 × 1.008 = 128.174 g/mol

  1. Count the atoms in C10H8: C 10, H 8.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 128.174 g/mol.

Elemental composition of naphthalene

ElementAtomsAtomic weightMass (g/mol)Mass %
C Carbon1012.011120.1193.709%
H Hydrogen81.0088.0646.2914%

Grams and moles of naphthalene

AmountEquals
1 g0.0078019 mol
10 g0.078019 mol
100 g0.78019 mol
0.1 mol12.817 g
1 mol128.17 g
1 g, in particles4.6984 × 10^21